java代码，为什么输入aabbcc不能出现a2b2c2，如何解决？

Question

代码如下：
public static void main(String[] args) {

        Scanner n =new Scanner(System.in);
        String n1 = n.nextLine();
        char[]x1 = n1.toCharArray();
        int count = 0;
        int b = 0;
        char c = x1[b];
        while (b <= x1.length)
        {
            if (c == x1[b])
            {
                count++;
                b++;
            }
            else
            {
                System.out.print((char) c+""+count);
                count = 0;
                b++;
                c = x1[b];

        }
    }
}

Answer 1

你题目的解答代码如下：

    public static void main(String[] args) {
        Scanner n =new Scanner(System.in);
        String n1 = n.nextLine();
        char[]x1 = n1.toCharArray();
        int count = 1;
        int b = 1;
        char c = x1[0];
        while (b < x1.length)
        {
            if (c != x1[b])
            {
                System.out.print((char) c+""+count);
                count = 0;
                c = x1[b];
            }
            count++;
            b++;
        }
        System.out.print((char) c+""+count);
    }

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